On the 24th of June each year many people in the Philippines celebrate what the Roman Catholic Church has designated as the Feast of Saint John the Baptist. The same feast is also celebrated in most other countries where there are Roman Catholics.
In many cities, towns and barrios in the Philippines people would traditionally douse water on their neighbors and passersby on this day. This is supposedly to commemorate the birth of the prophet John, who went about baptizing in all of Judea during the time of Jesus Christ (the first century A.D.).